How long are the appalatoin mountoin?

The Appalachian Mountains stretch approximately 1,500 miles (2,400 kilometers) from northern Alabama in the U.S. to the Canadian province of Newfoundland and Labrador. They are one of the oldest mountain ranges in North America, formed over 480 million years ago. The range varies in elevation, with the highest peak, Mount Mitchell, reaching 6,684 feet (2,037 meters) in North Carolina.